| 摘要 |
PROBLEM TO BE SOLVED: To provide a novel method of producing a xanthene compound having a fluorene skeleton which is useful as a raw material for polyesters, polyurethanes, polycarbonates, epoxy resins, modified acrylic resins, and so on.SOLUTION: A method of producing a xanthene compound having a fluorene skeleton is characterized by producing through a single step of carrying out a condensation reaction of a fluorene with a polyhydric phenol and a dehydration reaction of the hydroxyl group at the same time by using water as a reaction solvent, feasibility of the reactions at relatively low temperatures of 65°C or lower and providing the xanthene compound with a good color phase and high purity by suppressing formation of multimers produced by reactions of a plurality of fluorenes with a plurality of polyhydric phenols and oligomers produced by polymerization of polyhydric phenols. |
